Picus Scalaris_ 2. Picus Nuttallii
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
The Philadelphia lithographic firm of Bowen & Company (1859-ca 1871) produced this hand-colored lithograph of two bird species after original illustrations by William E. Hitchcock (ca 1823-1926) and John Cassin (1813-1869) also both of Philadelphia. The image was published as plate III in "Zoology of the Boundary" by S. F. Baird (1823–1887), published in Volume 2, Part 2, of the <i>Report on the United States and Mexican Boundary Survey.</i> The volume was printed in 1859 by Cornelius Wendell of Washington, D.C. The illustrations describe: Picus Scalaris (common name Ladder-backed Woodpecker, and Picus Nuttallii (common name Nuttall's Woodpecker).
National Museum of American History’s own description